1904-1931, 1939-1940 include Abstracts of the proceedings, no. 1-341 (bound at end of vol.)
1833-60 called parts 1-28; 1861-1936 issued without volume numbering
Vol. enumeration begins with v. 107 in 1937
1937-1938 issued in three series: A. General and experimental, B. Systematic and morphological, C. Abstracts; 1939-42 issued in 2 series: A and B
Plates for the years 1848-60 published cumulatively in 6 volumes; 1861-66 plates bound with text; 1867-1900 plates bound separately; 1901-1965 plates bound with text
Published for the Zoological Society of London by Academic Press